I'm confused to define pump center when check Centrifugal Pumps as per API 610, the pump with suction end, discharge top, and these two nozzle have distance along pump shaft centerline(draw below, I don't know how to attach the picture), I don't understand the description below which are in red colour, I can't see clear because the picture in API 610 is in three-dimention. can any one expain this clearly?
many thanks!
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where
C -------is the centre of the pump. For pump types OH2 and BB2 with two support pedestals, the centre
is defined by the intersection of the pump shaft centreline and a vertical plane passing through
the centre of the two pedestals (see Figure 23 and Figure 24). For pump types BB1, BB3, BB4
and BB5 with four support pedestals, the centre is defined by the intersection of the pump shaft
centreline and a vertical plane passing midway between the four pedestals (see Figure 22);